barbicklow



mym E. BAnltIcKLow, or san 1 CISCO, CALIFORNIA.

CUBETER.

Laiaaee.

Specification of Letters Patent.

ratenten ang.. a, inne.

application iuea December 4, 1a17. serial no. 205,298.

useful Improvements in Carbureters, of'

which the following is a specification.

This invention relates to a carbureter, and

lparticl'ilarly to improvements on the structure shown in my co-pendin entitled carbureter, -filed 1,917, Serial Number 197,233.

One of the objects of the present invention' is to provide a simple, compact carbureter which is particularly designed for handling low grade fuels, such as distillate, kerosene, and the like, and lin which gasolene may be employed for starting the engine and the lower grade fuel for runnin the engine under load when the engine an carbureter have been sufliciently heatedv by the' gasolene. Another object o'f the invention is to provide a novel form of throttle valve whic is so positioned that it regulates the volume of air admitted through the primary air inlet of the carbureter, thereby permitting the formation of a partial vacuum within the carbureter andl around the spray nozzle.` This is of great imporapplication tance as low grade fuels atomize more read-- ily and form a more homogeneous mixture with air under a partial vacuum. Another object of the invention is to heat the atomlized fuel and air during its passage through' lthe mixing chamber of the carbureter. Ani other obj ect is to provide a novel mechanism for o erating the throttle valve and in con-v junction therewith means for regulating the lift of the needle valve in the spray nozzle. Further objects will hereinafter apear. -r p The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference vto the accompanyin drawings, 1n whichigure 1 is a central, Vertical, longitudinal section through the carbureter.

Fig. 2 is a similar section, taken at rlght angles to Fi'g. 1.

Fig. 3 is a side elevation of 'the carbureter. I`Fig. 4 is a section taken on line 4-4 of lgteferring to the drawings in detail, A indicates the casing of the carbureter, which nthis instance is cylindrical in shape and ctober 18th,-

elongated, as shown. The upper end of the casing is flanged, as at 2, to permit it to be attached in the usual manner to the inlet manifold of an engine, while the lower end is entirely closedwby a bottom member 3 which is screwed into an annular 'fiange 4 formed on vthe casing. F ormed above 'the flange 4 is an annular opening 5, and supporting the flange with relation to the main casing of the carbureter is a plurality of lugs 6. These lu are four in number and are merely provi ed for the purpose of supporting the fiange 4 and therefore to a certain extent divide the annular opening into' four separate openings, as shown in Fig. 3.

Slidably mounted interiorly of the casing is. a piston valve 7 which will hereinafter be known as the throttle valve. This valve is attached to a sliding frame generally indi- -cated at 8, and as thisl frame is provided with means for raising and lowering the same within the casing, it can readily ,be seen that the throttle valve 7 may be raised to cover or uncover the opening 5 which forms the primary or main air intake of the V carbureter. The bottom section 3 is provided with a three-way valve 9 and a lever 10 `which may be connected, through a rod or any other suitable means, 4by which the valve may be turned to register With one fuel passageor the other, such as shown at.

11 and 12; the fuel passage 11 being for instance connected withl a source of gasolene supply while the fuel passage 12 may be connected with a source of low gravity fuel supply,l such as distillate, kerosene, or the like. The turning of the valve 3' permits one fuel or the other to be l`delivered to the spray nozzle generally indicated at 13.

- This nozzle 1'3 is formed as a part of the bottom section and the discharge of fuel through the spray nozzle is in this instance regulated by a'weighted needle valve, generally indicated at14. This needle valve is secured upon a stem 15,7which is slidably mounted in the sliding frame 8 (see Figs. 1

` an annular shoulder- 18.which forms' a seat for a valve 19. This valve will hereinafter be termed the secondary valve, and it is normally held Onthe seat 18 by means of downwardly projectingl guide plns 20 which are surrounded vby Springs 21 and guided by extensions 22 formed in the bottom section of the carbureter.

The cone-shaped cap 17 is, as previously described, spaced from the spray nozzle and is held in this position by co-relative arms 23, secured on the spray nozzle or formed mtegrally therewith. The openings formed between'V said arms permit air, when the throttle valve 7 is opened, to pass through thelopenings 5 and the openings formed between the arms 23, and then up through the annular space formed between the cap 17 and the tip of the spray nozzle. L The air thusv entering in an annular stream strikes the head 14a formed on the needle valve and is 'thus deflected outwardly, as indicated 'by the arrows (see Fig. 1).

The valve 19 normally retains its seat When the engine is idling or Operating under comparatively slow speeds, but an increase of engine speed above a certain number of revolutions. produces a vacuum sufiiclently high within the carbureter to lift the valve 19 from its seat, thus permitting a portion` of the air admitted through the openings 5 to pass between the seat 18 and the valve 19 directly into the mixing Chamber, it being understood, of course, that a considerabl'e volume of air is ,slmultaneously passlng through the annular passage formed beltween the nozzle and the cap 17. The two streams of air will thus meet or cross each other, as shown by the arrows, thereby producing an ideal atomizing or mixing action which thoroughly breaks up the fuel disi charging' from, the spray nozzle.

Thls atomizing action is further facilitated when the spray dischargingI from the nozzle Strikes the lower surface of the head 14:8, formed on the needle. This head being round and tapered as shown' forms an ideal i deflecting surface for evenly spreading the fuel particles discharging from the sprayl 4nozzle and also forms a deflector for the air passing through the annular passage formed between the cap and the spray nozzle. The structure just described relates entirely' to mechanical means for atomizing 'or breaking up the fuel and for forming a homogeneous mixture between the fuel and the incoming air. Other means have been provided for further assisting the atomizmg action and for prdducing a homogeneous mixture before the air and fuel can leave the carbureter. The additional means just referred to is produced by two entirely different and separate actions, one being produced by' heat and the other by a vacuum. The heating of the mixture is produced'by placing a plurality of superposed tubes 25 above the spray nozzle. These tubes are connected at one end with an intake chamber 26, which in turn is connected through a ilexible tube, or other suitable means, with the exhaust manifold and at the opposite end with a discharging Chamber 27 which in turn may be provided with a pipe .which returns the exhaust gase's to the exhaust manifold or to any other convenient point. The exhaust gases admitted to Chamber 26 pass through the tubes 25 and then discharge through the chamber 27 and the pipe connected therewith from where they may be returned to the main exhaust pipe or any other suitable point. The exhaust gases in their passage through the tube- 25 cause said tubes to become extremely hot and they, therefore, serve as a 'means for heat-ing the air and atomizing fuel during their passage through the mixing chamber of the carbureter. The tubes 25 also serve as defiectors between which the air and atomized fuel must necessarily pass, thereby furtherinoreasing the atomizing and mixing action of fuel and air.

The second feature, e. the vacuum spoken w of, is produced by placing the throttle valve at the lower end of the -casing at a ,point where it regulates the volume of air admitted through the main or primary air inlet of the carbureter. This naturally creates a vacuum within the carburetervand around the spray nozzle and, therefore, permits the fuel particles to become more readily atomized, due to the fact thatv any liquid material will atomize or evaporate more readily in ,a vacuum than under atmospheric pressure. The several features here provided permit the formation of a practically homogeneous mixture of fuel and air as it can readily be seen that not only mechanical means have been provided for producing an l`ideal atomizing action but vacuum and heat are also utlllzed in conjunction therewith for the purposeof furthering the atomizing action and the mixing of ,fuel and air. i

The lifting frame 8, to which the throttle valve 7 is secured, is r'aised and lowered within the casing in the following manner: Journaled in the upper end of the casing' is a sleeve shaft 30 and secured on said shaft is a lever 31. 'This lever is provided with a pin 32 which enters the slotted extension 33 formed upon the sliding frame. The sleeve shaft is also provided with a lever 34,- which is operated in the usual manner both by the throttle lever on the steering wheel and by the accelerator. Movement of the lever 34 will, therefore, turn the sleeve shaft 30 and the lever 31 and movement is thereby transmitted to raise or lower the frame 8 and the throttle valve connected therewith.

The cam 16 regulating the lift of the needle Valve 14 is secured upon a shaft 35 which passes through the sleeve shaft 30. This shaft is also provided'with a lever 36 which is adapted to move in unison With the lever 341, the lever 36 being connected with the lever 34 by means of an adjusting screw forated, as shown at 45. This ringvalve may serving as a .means for regulating the- 37 and a spring;38. The screw 37 and spring.

38 serve the purpose of changing the posit'ion of the cam 16 with relation to the sliding frame and therefore permit the lift of the needle'valve to be adjusted with relation tothe opening of the throttle valve. The cam 16 serves asa positive means for regulating the' lift of the needle valve and while the lever l'lserves as a means for positively lifting the throttle valve and as one is adjustable' with relation to the other it is possible to maintain' a constant proportion of fuel and air regardl'ess of the position of either' the throttle valve or the needle valve. This is also of .considerable importance as a.

' uniform mixture may be maintained practically under all conditions. This feature is, however, covered in my' copending application previously referred to and need not be further described.

Secured on the upper end of the lifting frame is a sleeve valve40. This valve is adapted .to cover or uncover a series of perforations 41 formed nearv the upper end of the casing and it is merely provided for the purpose of serving as an auxiliary air valve, that is, it may or it may not be used, as it is adjustably secured on a threaded extension 42 formed on the upper end of the frame;`

Formed exteriorly of the casingis anannular shoulder 43 and resting upon said shoulder and turnably mounted on the casing is a ring valve 44 which is also perbe turned to bring its openingsinto or out of register `with the openings 41, thereb'y amount. of auxiliar'y air admitted at this point. Adjusting of the. sleeve valve 40 by.

turning-t'hereof permits it to be set so that it Will never uncover the openings 41` even thoughthe throttle valve is lifted to its extreme position, and it can, therefore, lbe seen' that it may be' used, if desired, or set in a position where it will not operate, However, it may serve the function of an auxiliary air' valvewhenever desired by merely raising it ,vertically on the threaded extension 42 and securin it when so adjusted by alock nut 42a. T e -carbureter may otherwise be pro- 'vided with a valve, such as shown at 50.`

This valve may be connected with a source of water supply or'with the radiator to permit any steam generated tol enter the carbureter when. the valve is in zthe position of lFig. 4, 'this' valve lbeing opened or closed at thewill of the operatorvy a lever extension 51, such as shown. larly -adapted for admitting steam or water, it ma also serve as an auxiliary air valve as the [type of valve employed is a three-way valve and air may, therefore, enter at the point 52.3' lSecured to the stem 15 supporting the needle valve is a collar 15a, 'and secured to ile it is particu-` the pocket 61 formed below the primary air inlet 5. The sliding frame is then moved down to close the throttle valve and the engine may then be started, .thus permitting a very rich mixture to enter the cylinders during the first few revolutions of the engine when starting. Gasolene is, of course, 'preferably employed when starting until the engine and' the tubes 25 carbureter have been su low grade fuel may then be turned on by merely changing the vposition of the valve 9.

`While two auxiliary airvalves' are here shown, one being operated in conjunction with the' throttle and .the other, such 'as shown at 50, beingv o erated independently assing through the p thereof, it is obvious t at both or either may bel .eliminated, if desired; ,Also I wish vit understood that the materials and finish Vof the several' parts of'the carbureter maybe such'as the experience and judgment of the manuifacturer may dictate and that various changes in form, -proportions and minor details'of construction may be resorted to within the scope of the appended claims and that I do not wish to limit myself to the specific' desi and construction-here shown.v

avinglthus described my invention, what4 -,I claim and desrre to secure by Letters Pati ent. is-

ciently heated. Thej w 1. In a carbureter, a casing having an air i inlet, a slidable valve controlling said inlet, a fuel nozzle in the casing, a slidable valve controlling the fuel nozzle, operatin means in -the caslng rigidly connected to tghe first 1 valve and shdably connected to the second valve to allow the latter to slide independent of the Operating means, means for raising andlowering said Operating means and means controlled byv the raising and lowering means for controllin the extent of upward movement of the slidable valve by engagement with .the latter.

2. In a carbureter, a casing having an air inlet, a'slidable valve controllin sald inlet, a fuel nozzle in the casing, a slidable valve controlling the fuel nozzle, Operating means` in the casm rigidly connected to the first valve and s idably connected to the second valve to allow the latter to slide independent of the Operating means, means for raising and lowering said Operating means, and means borne by the Operating means to posi tively raise the second valve ,upon predetermined movement of said Operating means and means. controlled by the raising and 'lowering means for controlling the extent of upward movement of the slidable valve by en agement With the latter.

3. carbureter comprising a casing open at its upper end and closed at the lower end, a primary, annular air inlet opening formed near the lower end of the casing, a piston throttle valve slidably mounted in the casing adapted to open or close said annular opening, a spray nozzle within the casing, means for deliveringliquid fuel to said nozzle, a sliding frame within' the casing to which the throttle valve is secured, means for raising and lowering said frame, a weighted needle valve vsupported in alinement with the spray nozzle and adapted to regulate the amount of fuel discharged thereby, and

f means on the sliding frame for raising the` needle 'valve with relation to the spray nozzle.

4. A earbureter comprising a casing open at its upper end and closed at the lower end,

a primary, annular air inlet opening forme-d near the lower end of the casing, a piston throttle valve slidably mounted in the casing adapted to open or close said annular opening, a spray nozzle within the casing, means for delivering liquid fuel to said nozzle, a slidin frame within the casingto which the thrott e valve is secured, means for raising and lowering said frame, a stem slidably mounted in .the sliding frame, a weighted needle valve secur'ed on the stem adapted to enter the month of the spray nozzle, and means on the sliding frame for raising the needle valve away from the spray nozzle.

5. A carbureter comprising a casing open at its upper end and closed at the lower end, a primary, annular air inlet opening formed near the lower end of the casing, a piston throttle 'valve slidably mounted in the cas- `ing adapted toA open or close said annular openlng, a spray nozzle within the casing, means for' delivering liquid fuel to said nozzle, a sliding frame within the casing to which the'throttle valve is secured, means for raising and lowerin said frame, a stem sliding frame, a weighted needle valve sec'ured on the stem adapted to enter the month ,of the spray' nozzle, and meanson the sliding frame for raising the needle valve away from the spray nozzle, said means oomprising a collar secured on the needle valve stem, and a finger on 'the frame adapted to engage said collar when the frame is l'aised to its extreme uppermost position.

6. A carbureter comprisinga cylindricalshaped casing open at its upper end, a bottom member forming a closui'e for the lower neiaaea end of the casing, an annular inlet opening formed in the casing above the bottom section, a piston throttle valve slidably mounted within the casing adapted to open or close the annular air inlet opening, a spray nozzle carried by the -bottom section, means for delivering fuel thereto, a needle valve adapted to regulate thev discharge of fuel from the nozzle, a cone-shaped 'cap surrounding the nozzle and spaced therefrom, an annular seat on the lower end of said cap, a valve slidably mounted withln the throttle valve engaging said seat, means for retaining said valve in normal engagement with said seat, and means for raising and lowering the throttle valve independently of said last named valve.

7. A carbureter 'comprising a oylindricalshaped casing open at its upper end, a'bottom member forming a closure for the lower end of the casing, an annular inlet opening formed in the casing` above the bottom section, a piston throttle valve slidably mounted within the casing adapted to open or close the annular air inlet opening, a

spray nozzle carried by the' bottom section,

means for delivering fuel thereto, a needle valve adapted to regulate the discharge of fuel from the nozzle, a cone-shaped cap surrounding the nozzle and spaced therefrom, an annular seat on the lower end of said cap, a valve slidably mounted within the throttle valve engaging said seat, means for retalning said valve in normal engagement with said seat, a sliding frame mounted Within the casing to Awhich the throttle valve is secured,,a stem slidably mounted in said sliding 'frame supporting the needle `valve, means for raising and lowering the formed in the casing above the bottom section, a piston throttle' valve slidably mounted within the casing adapted to open or close the' annular air inlet opening, a

spray nozzle carried by the bottom section,

means for delivering fuel thereto, a sliding frame within the oasing to which the throttle valve is secured, a 'Stem slidably mounted in said sliding fram'e, a weighted needle' valve seoured on said stem adapted to enter the mouth of the spray nozzle, means on the sliding frame for lifting the needle valve away from the spray nozzle, means for lifting the sliding frame, together with the throttle valve secured thereto, and means Leiaeee frame within the casing to which the throtp tle valve is secured, a stem slidably mounted in said sliding frame, a weighted needle valve secured on said stem adapted to enter the month of the spray nozzle, a plurality of auxiliary air inlet openings formed in the casing near its upper end, an auxihary air valve adjustably secured to the slidmg frame adapted to cover or uncover said auxiliary air inlet openings, and means for raising and lowering the gether with the throttle valve and the auxilary air inlet valve carried thereby.

10. A carbureter comprising a cylindricalshaped caslng open at .its upper end, abottom member forming a closure for the lower end of the casinlg, an annularinlet opening formed in the casing above the bottom section, a piston throttle valve slidably mounted within the casing adapted .to open or close the annular air inlet openlng, a spray nozzle carried by the bottom section, means for delivering fuel thereto, a sliding frame within the casing to which the throttle valve is secured, a stem slidably mounted in said sliding frame, a'iweighted needle valve secured on said stem adapted to enter the month of the spray nozzle, a slotted extension on the sliding frame, a shaft extending through the casing and journaled thereln, a Crank arm on said shaft, a pin on said crank arm adapted to engage the slotted extension on the slidi frame, and means for turning the shaft an the crank arm carried thereby to raise and lower the sliding frame together I with the throttle valve seoured thereto.

11. A carbureter'comprising a cylindricalshaped casing open at its upper end, a bottom member forming a closure for the lower end of the casing, an annular inlet opening formed in the casing above the bottom section, a piston throttle valve slidably monnted within the casing adapted to open or close the annular air inlet open1ng,a spray nozzle carried by the bottom section, means for delivering fuel thereto, a sliding frame within the casing to which the throttle valve is secured, a stem slidably mounted in said sliding frame, a weighted needle valve secured on said stem adapted vto enter the month of the spray nozzle, a slotted extension on the slidsliding frame, to-

ing frame, a shaft extendingthrough the casing and journaled therein, a sleeve journaled on said shaft, a cam secured on the shaft in alinement with the needle valve stem, a crank arm secured on the sleeve, a pin on said crank arm engaging the slotted extension on the sliding frame, means for turning the shaft and the sleeve in unison, and means for adj usting the sleeve with relation to the shaft circumferentially.

12. A carbureter comp'rising a cylindricalshaped casing open at its upper end, a bottom member forming a closure for the lower end of the casing, an annular inlet opening formed in the casing above the bottom section, a piston throttle Valve slidably mounted within the casing adapted to open or close the annular air inlet opening, a spray nozzle carried by the bottom section, means for deliverin fuel thereto, a sliding frame Within the casing to which the throttle -valve is secured, a stem slidably mounted in said sliding frame, a weighted needle valve secured on the lower end of said stem adapted'to enter the month of the spray nozzle, a cone-shaped cap surrounding the spray nozzleand spaced from same, an annular seat on 'the lower end of said cap, a valve slidably mounted within the throttle valve engaging said seat, Springs connected with said valve adapted to normally retain said valve on its seat, a plurality of auxiliary air inlet openings formed in the oasing near the upper end, a sleeve valve carried by the sliding frame adapted to open or close said openings, means for raising and lowering the sliding frame together with the auxiliary air valve and the throttle valve, and means operablein conjunction with said means for regulating the lift of the needle valve and its stem.

13. A carbureter comprising a cylindrical-shaped casing open at its'upper end, a bottom member forming a closure for the lower end 'of the casing, an annular inlet opening formed in the casing above the bottom section, a piston throttle valve slidably mounted within the casing adapted to open or close the annular air inlet opening, a spray nozzle carried by the. bottom section, means for delivering fuel thereto, a sliding frame within the casing to which the throtlie tle Valve is secured, a'stem slidably monnted in the sliding frame, a weighted needle ing near the upper end, a sleeve valve carried by the sliding frame adapted to open or close said openings, means for raising and lowerin the sliding frame together with the auxlliary air valve and the throttle valve, means operable in conjunction With said means fo'r regulating the lift of the needle valve and its Stein, and means on the sliding frame operable independently of said last named means for raising the needle valve away from the nozzle.

14. A carbureter comprising a cylindrical-shaped casing open at its upper end, a i ottom member forming a closure for the lower end of the casing, an annular inlet opening formed in the casing above the bottom section, a piston throttle valve slidably mounted within the casing adapted to open or close the annular air inletv opening, a spray nozzle carried by the bottom section, means for delivering fuel thereto, a sliding frame within the casing to which the throttle valve is secured, a stem slidably mounted in the sliding frame, a weighted needle valve secured on the lower end of said stem adapted to enter the mouth of the spray nozzle, a cone-shaped cap surrounding the spray nozzle and spaced from same, an annular seat on the lower end of said cap, a valve slidably mounted within the throttle valve engaging said seat, Springs connected with said Valve adapted to normally retain said valve on its seat, a pluralit of auxiliary air inlet openings formed in the casing'near the upper end, a sleeve valve'carried by the sliding frame adapted to open or close said openings, means for raising and lowering the sliding frame together With the auxiliary air valve and the throttle valve, means operable in conjunction With said means for regulating the lift of the needle valve and its stem, a spring finger on the sliding frame, and a collar on the needle valve stem adapted to be engaged by the spring finger to lift the needle valve away from the spray nozzle when the sliding framev is lifted to its extreme uppermost osition.

15. n a carbureter, a casing having an air inlet, a fuel nozzle in the casing, a valve controlling the air inlet, a valve controlling the fuel nozzle, a memberv rigidly secured to the air controlling valve, means to slidably support the fuel controlling valve from said member to allow the former to move'independent of the latter, and actuating means common to said member and supporting means of the fuel controlling valve for engaging and Operating each.

16. A carbureter comprising a cylindrical-shaped casing open at its upper end, a

bottom section forming a closure for the lower end, an annular air inlet opening .formed in the casing just above the bottom section, a piston throttle valve slidably mounted within the casing adapted to open or close said annular air inlet opening, a spray nozzle within the carbureter centrally disposed With relation to the throttle valve, means for delivering fuel to said spray noz'- zle, a needle valve adapted to regulate the discharge of fuel from the spray nozzle, a plurality of auxiliary vair inlet openings formed in the casing near the upper end, a sleeve valve within the casing adapted to open and close said openings, means for lifting the throttle valve and the auxiliary air valve in unison, and means for adjusting the position of the auxiliary air valve With relation to the throttle valve in a Vertical direction.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

IRVIN E. BARRICKLOVV. Witnesses:

THOMAS CASTBERG, JOHN H. HERRING. 

